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❤️ Health & fitnessFree
Wilks 2020 coefficient calculator
A man weighing 90 kg with a 700 kg total scores about 537 Wilks 2020 points. Enter your total, body weight and sex to compare your strength fairly with lifters…
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Moles of element in compound calculator
2 moles of water hold 4 moles of hydrogen atoms, because the subscript of hydrogen in H2O is 2. Enter the moles of compound and the subscript of the element you…
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Moles to particles calculator
One mole of any substance is exactly 6.02214076 × 10²³ particles, so the calculator multiplies your moles by that constant and returns the count of atoms…
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Tonicity osmolarity ratio calculator
Normal saline at 308 mOsm/L against a 300 mOsm/L plasma reference gives a ratio of about 1.027, inside the isotonic band.
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Trouton's rule calculator
Water boiling at 373.15 K gives a Trouton estimate of 32837.2 J/mol for its enthalpy of vaporization.
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Absolute neutrophil count calculator
Turn a lab differential into an absolute neutrophil count: a white count of 7.5 ×10³/µL with 55% segmented neutrophils and 3% bands gives 4.35 ×10³/µL, or 4,350…
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Alcohol calorie calculator
Estimate the calories in one drink from its volume, strength and sugar: a 330 ml lager at 5% ABV with no residual sugar holds 13.02 g of alcohol and 91.13 kcal.
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Anion gap delta ratio calculator
Check whether a high anion gap acidosis hides a second disorder: a gap of 28 with bicarbonate at 12 means a rise of 16 against a fall of 12, a ratio inside the…
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APRI calculator
Estimate the likelihood of liver fibrosis from two routine lab values: AST of 80 U/L with 150 ×10⁹/L platelets and the usual upper limit of 40 gives an APRI of…
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BUN to creatinine ratio calculator
Divide BUN by creatinine, both in mg/dL. Values of 14 and 1 give a ratio of 14, inside the 10 to 20 band taught as normal.
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Caffeine half-life decay calculator
Caffeine fades by half-lives: 100 mg with the usual 5-hour half-life leaves 50 mg after 5 hours. Enter the dose, the hours since and, if you know it, your own…
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Conception window calculator
Starting from a period on 1 March 2026 with a 28-day cycle, ovulation falls on 15 March and the fertile window runs from 10 to 16 March.
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Due date Naegele rule calculator
A last period that started on 1 January 2026 gives an estimated due date of 8 October 2026, 280 days later.
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Estimated fetal weight calculator
Four standard ultrasound measurements give an estimated fetal weight: a BPD of 9 cm, HC of 32.5 cm, AC of 31 cm and femur of 6.5 cm come to about 2543.3 g with…
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eGFR CKD-EPI 2009 calculator
Get the estimated glomerular filtration rate from the 2009 CKD-EPI equation: a creatinine of 1 mg/dL in a 50-year-old woman gives 65.6 mL/min/1.73 m², stage G2.
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eGFR cystatin C calculator
Estimates kidney filtration from cystatin C instead of creatinine: 1 mg/L in a 50-year-old woman gives 75.4 mL/min/1.73 m², stage G2.
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Fractional excretion of urea calculator
Compares how much urea reaches the urine with creatinine filtration: plasma urea 40, urine urea 200, plasma creatinine 1.2 and urine creatinine 80 give a FEUrea…
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Gestational age from due date calculator
Works out how far along a pregnancy is from the due date: with a due date of 15 October 2026, on 15 May 2026 the pregnancy is at 18 weeks and 1 day, with 153…
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Calories to kilojoules converter
250 kcal is 1046 kJ. Type the kilocalories from a menu, a diet app or a US label and get the kilojoules that European and UK packaging prints, using the exact…
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Keto carb limit calculator
On 2000 kcal a day, a keto plan allows at most 25 g of net carbs. Enter your daily calories and get the gram ceiling before you write a shopping list or log a…
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❤️ Health & fitnessFree
Modified shock index calculator
A heart rate of 110 bpm over a mean arterial pressure of 93.33 mmHg gives a modified shock index just under 1.2.
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Net carbs calculator
25 g of total carbohydrate with 8 g of fiber and 5 g of sugar alcohols leaves 12 g of net carbs. Copy the three numbers from the label and get the grams that…
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Non-HDL cholesterol calculator
Total cholesterol of 200 mg/dL with an HDL of 50 leaves a non-HDL cholesterol of 150 mg/dL. Enter both values from your lipid panel, in the same unit, to see…
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QTc Hodges calculator
A QT of 400 ms at 80 beats per minute gives a Hodges QTc of 435 ms, because the correction adds 1.75 ms for every beat above 60.
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Recipe portion scaler
Going from 4 to 6 servings multiplies every amount by 1.5, so 250 g of flour becomes 375 g and 2 eggs become 3.
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Calendar method safe days calculator
In a 28-day cycle, the Standard Days Method treats days 8 to 19 as higher fertility and leaves 16 safer days: 1 to 7 and 20 to 28.
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Sleep cycle bedtime calculator
For a 07:00 alarm and five full cycles, lights out at 23:15, leaving 15 minutes to drift off; shorter options follow at 00:45, 02:15, 03:45 and 05:15.
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Sleep midpoint chronotype calculator
Enter when you fell asleep and when you woke to get the clock exactly halfway through your night: 23:00 to 07:00 is eight hours with a midpoint at 03:00, an…
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Sweat rate calculator
Weigh in before and after training, add what you drank and get your hourly sweat loss: 72.5 kg before, 71.8 kg after and 0.5 L drunk in 60 minutes means 1.2…
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Triglyceride-glucose (TyG) index calculator
Fasting triglycerides of 150 mg/dL and glucose of 90 mg/dL give a TyG index of 8.817298, a research marker linked to insulin resistance.
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Attic insulation depth calculator
Reaching R-49 with blown cellulose rated 3.2 per inch takes 15.3125 inches. Enter your target, the product's R-value per inch from its data sheet and any…
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Baseboard heater sizing calculator
A 150 sq ft room in a moderate climate needs 1500 watts, which is 6 feet of standard 250 W-per-foot baseboard heater.
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Block wall calculator
A 20 m² wall in 0.4 by 0.2 m blocks with 5 percent waste takes 263 blocks and 27 bags of mortar. Enter the wall area, the face size printed on the pallet and…
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Brick mortar bag calculator
500 bricks at 40 bricks per bag need 13 bags of mortar mix, with room left for 20 more bricks. Enter your brick takeoff and the coverage printed on the bag, add…
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Ceiling fan size calculator
A 200 sq ft room calls for a 48-inch ceiling fan, within a 44 to 50 inch range, and a single fan is enough.
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Chair rail calculator
46.2 feet of chair rail, waste included, runs around a room with a 48-foot perimeter and 6 feet of doorways; in 8-foot sticks that is 6 pieces with 1.8 feet to…
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CMU grout fill calculator
40 filled cells with 0.03 m² cores in a 2.4 m wall take 2.88 m³ of grout, or 3.024 m³ with the default 5% waste.
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Concrete countertop calculator
A 2.5 m kitchen run, 0.65 m deep and 4 cm thick, needs 0.065 m³ of mix, which rounds up to 5 bags at the default yield.
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Concrete mix ratio calculator
For 1 m³ of concrete at the classic 1:2:3 mix, batch a sixth of a cubic metre of cement, a third of sand and half of gravel.
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Concrete patio calculator
A 12 m² patio poured 10 cm thick is 1.2 m³ of concrete, 1.32 m³ with the default 10% waste, or 88 bags at the default yield.
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Concrete wall calculator
A 5 m wall, 2.4 m high and 20 cm thick, takes 2.4 m³ of concrete, or 160 bags at the default bag size.
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Concrete control joint calculator
A 40 × 30 ft slab about 4 inches thick gets joints no more than 7.992 ft apart: 8 joint lines totalling 270 linear feet.
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Deck beam span calculator
A double 2×10 Douglas Fir-Larch beam carrying 10 ft joists can span 7.515 ft between posts under 40 psf live and 10 psf dead load, with bending as the limit.
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Deck stain calculator
320 ft² of deck plus 48 ft of 3 ft railing, two coats and 10% waste at 200 ft² per gallon need 6.688 gallons, so you buy 7.
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Diagonal tile layout calculator
A 5 × 4 m room with 0.6 m square tiles and 5% breakage takes 67 tiles laid straight and 70 laid on the diagonal: 3 extra tiles.
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Downspout count calculator
120 ft of gutter draining 1800 ft² of roof needs 3 downspouts: 3 for the length at 40 ft per outlet and 3 for the area at 600 ft² each.
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Drywall tape calculator
20 sheets of 4×8 drywall with every joint finished need 264 feet of tape including 10% waste, which is 2 rolls of 250 feet.
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Drywall texture calculator
400 square feet sprayed in one coat with 10% overspray take 1.76 gallons of mixed texture, so you buy 2 gallons of ready-mix or 1 bag of dry powder.
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Duct size calculator
400 CFM at 700 FPM calls for a 12-inch round duct, the next stock size above the exact diameter, plus a rectangular equivalent at a 1.5 width-to-height ratio.
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Fascia board calculator
80 feet of eaves plus 40 feet of rakes, with 10% waste for mitres and joints, come to 132 feet of fascia, or 11 boards of 12 feet.
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Floor joist calculator
A 144-inch-wide room framed at 16 inches on center needs 10 floor joists: 9 full bays plus the one at the starting end.
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Garage floor tile calculator
A 36 m² garage floor in 0.4 m interlocking tiles with 5% waste needs 237 tiles, or 20 packs of 12.
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Hardwood flooring calculator
Solid hardwood for a 250-square-foot room comes to 14 boxes when each carton covers 20 square feet and you keep the default 10% for cuts and culls.
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Header length calculator
A 36-inch rough opening with 1.5-inch seats on both jack studs needs a 39-inch header. The calculator adds the opening and the bearing at each end into one…
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HVAC tonnage calculator
A 2,000 square foot home in climate zone 4 has a cooling load of 44,000 BTU per hour, which rounds up to a 4-ton air conditioner.
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LVL beam ply calculator
A 16-foot span carrying 400 pounds per linear foot gets a 14-inch LVL depth by rule of thumb and needs a single 1.75-inch ply under the default stresses.
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Metal roof screw calculator
A 1,200 square foot metal roof with screws every foot along battens set 2 feet apart needs 600 screws, or 660 with the default 10% extra.
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Mortar joint volume calculator
500 bricks measuring 0.19 by 0.057 by 0.09 m laid with 10 mm joints need 0.11565 cubic metres of mortar in their bed and head joints.
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Nominal to actual lumber size
A 2x4 is really 1.5 by 3.5 inches, and a 2x8 is 1.5 by 7.25. Type a board label such as 2x4, 2-by-4 or two-by-four and get the dressed thickness and width of…
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Electrical panel load calculator
A 2,000 sq ft home with the default kitchen and laundry circuits comes to 5,625 VA after demand factors, which at 240 V points to a 60 A main panel.
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